Yes this sentence is a fragment. It doesn't have a predicate and sentences need to have a subject and a verb (predicate) in order to be complete.
..."but she was still woozy from the opiate her captors used to drug her."
"She didn't dally because the guards would be searching for her in a matter of minutes."
"Alex gorged herself on a bag lunch that one of the guards had left unattended near her cell."
"Seconds later, she began looking for the antiquated truck that the guards had used to transport her to the compound."
"...but she had to make it out of the jungle before she could expose the kingpin's felonious operation to the public."
Chad brought a tent, a sleeping bag and a fishing rod.
Answer:
Once I gave someone good advice, and that was to do your homework on your own and to not go to strangers for help. The end.
Explanation:
